Joel78Vette, What type pistons do you have in this engine? Flattop or dished pistons. Do you know the name brand or part number, or piston head volume? The cylinder head chambers are 60.2 ccs on the set of heads on the engine now correct! You also say you have another set with the chamber volume of 63ccs. These measurements need to be checked and correct! Has the deck of the block been milled, also did you measure from the top of the piston at TDC to the deck of the block. You said you have .016 deck clearance. Please post some answers.

I have the speed pro H345NCP .030", flat top, 4 valve relief Pistons. They are about 6 cc volume.

Yes, 60.2 currently but will more than likely change to my 62cc heads once the pressed in studs are removed to make way for my screw in studs and guideplates.

Block has been milled some. I am sitting .016" in the hole. Hope this helps you help me. Thank you!